Orbital Question (1 Viewer)

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Find the orbit radius of an earth satellite in a circular orbit if the period if 1d.

I'm at a dead end. So far I have;

r^3 = (GMT^2) / (4(pi)^2)

r^3 = (6.67*10^(-11) * 6*10^(24)) / (4 * pi^2)

and I get

r = 21642

The book says 42.2Mm. I'm only off by a couple of million meters, hahaha.

Where am I going wrong?

Thanks,
Bernie
 
You need to use the value of T in seconds for the constants you used to be correct.
 
Argh!!!! Thud, thud, thud ....

That's the sound of me banging my head against the wall!

Thanks for the quick reply.

Bernie
 

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